Auxiliary lock



6. H. Bocmus AUXILIARY LOOK Filed Sept. 28.1926 4 Sheets-Sheet ,1

0 on" cameo 1 n my 10 p amww G. H. BOCKIUS AUXILIARY LOCK Filed Sept. 28. 1926 4 Sheets-Sheet 5 WII mum a rm! W N H G. H. BOCKIUS I AUXILIARY LOCK Filed Sept. 28, 1926 4 Sheets-Sheet 4 GHBociiizw y MM W Patented Dec, 11, 1928:.

enonen n. 'Booxms, OFHCANTdN, onto, ASSIGNOR' TO minnow & noox oona PANY, .OFY-CANTONVOHIO, AconPoRATIoN OF .OHIO. r

auxin-Inna LOCK.

Application fileddsepteinber 28', 1926. seine No. 138,184,

g The invention relates to auxiliary locks for bolt work, and more particularly to an auX1liary locking device for the bolt work of the ordinary locking mechanism for the doors'of safes and vaults.

Safe and vault doors have been provided with auxiliary locking-devices for automatic operation to lock the bolt Work of the doors when the same are tampered with either by oXy-acetylene or other torch flames, or explosives, for preventing operation of the bolt work and thereby preventing opening of'the doors.

Auxiliary locking devices of this character whichhave heretofore been used, include a relatively large number of working parts,

each'dilferent from the others, and have consequently been-relatively diflicult and relatively expensive to manufacture; and, in

' a minimum number of working parts,and

adapted for easy and economical manufacture; and

Second, to provide anauxiliary lock for the bolt work of a vault door and the like made of a minimum number of parts constructed and arranged for simplicity and certainty of operation. 7

These and ancillary objects are attained the present lmprovements by a construction and arrangement which may be stated in I general terms asincluding a heavy weight suspended in an upright channel or guideway provided therefor in thevault door, by means of a fragile supporting member arranged to separate upon an application of heat or explosion, such as a chainincluding one or more links formed of a metal which V fuses at-aflow temperature, and, which may be shattered b "an explosion, there being a preferably cyllndric pin mounted upon the weight and normally extendingtherefrom in alinement-With parts of the: bolt "work for permitting operation thereof, but adapted for movement to prevent operation of the bolt Work when one or more of the fusible and weight drops.

Preferred embodiments of the invention .are illustrated in the accompanyingdrawings, forming'part hereof, in which;

Figure 1 is a rear elevation of-a rectangu la r vault door showing the application of the invention to the usual bolt work thea'uiiiliary lock being in normal noperative position;

an auxiliary locking mechanism for tli eboltwork of a'circular door. I

' Similar numerals refer to similar parts throughout the drawings.

indicated generally at 10,1and may 'includea plurality of plates 11, 12,113, and l4,fpreferably made of different grade'sof'steel,;certain of the plates as 13 being of multiple pl'yjmaterlal and drill resisting, and certain of the and the usuall'ocking" bolts 17 are vslidab'ly located through said bars and arranged-to 'be moved in'unison'by means of hasten carrying barslS, one of which isv provided for boltson each side of the door beingv connected to the bolt carrying bar.

A pair of alined rack bars 19, is connected to'the upper and lower bolt carrying bars, each of said rack bars being engaged upon opposite sides by the pinionsi 20 and near its ,inner end bypinion 21 I A pairof short rack bars 22 is connected to each of thes'ide bolt carrying bars and engages the adjacent pin- 1OI1" 0.v

j The operating bar is provided wi'thrack portions engaging the pinions'21 and with a rack port10n24c'engag'1ng the pinion 25 upon the operating spindle- 26. Allioftheabove construction is usual in safe and vault; door Fig. 2, a fragmentary enlargement ofthe' 7o a 131g, 4-, fragmentary perspective view of 'a circular vault door. llu'stratlng a1 fmo'dified form of the invention adapted for providing 9o each'side of the door, and all of the locking "work, and maybe Varied to somee tent, and does not form apart o f-Ythe presentinvention.

A11 p t c an el or -y 2. havin an enlarged lower Weigh chamber-128, providedin the door preferably at the rear of plate 11, and the weight 29' is suspended therein upon a fragile supporting member almimged to separate upon the application of heat or explosion, such asa chain composed of alternate links 30 and 31, supported at its upper end as by a screw plug 32, the links 31 being formed of a metal which fuses at a low temperature, and which may be shattered by an explosion.

The preferably cylindric in 33 is mounted in the weight 29, and extends laterally there from througli a. vertically elongated aperture 3a in the rear door plates.

The pin 33 is normally in alinement with a horizontally extending notch 35 preferably in. the right hand lower short rack bar 22 of the bolt work.

As illustrated in Figs. 1 and 3, the bolt work is in extended and locking position, and the slot 35 in the lower right hand rack bar 22 being sufiiciently lar e to pass over the pin 33 and normally alined therewith, the boltework may be operated at all times when the in 33 is'alined'with the slot 35,.rotation of re s indle 26 operating all ofthegrack bars an pinions, to withdraw or extend all of thelocking bolts 17 in the usual manner.

The bolt work being in locked or extended position, when an oxy-acetylene or other torch or an explosive is used in an attempt to Openthe door by anunauthorized person, one or more of the alternate links 31 will be melted or shattered allowing the weight. 29 to dropto the bottom ofitschamber 28..

When the weight drops, as illustrated in Fig.2; the pin 33 drops Withit out of'alinement with. the notch 35 in the lower right handrack bar. 22, back of andpreferably in abut-mentgwith the lowerleft hand corner 36 thereof, thereby dogging ofl'l and stoppin the withdrawal'of the lower right hand rack bar 22 and thereby preventing operation of the entire bolt work.

The modifiedform of the invention as applied'to a circular door, indicated generall' at 10' illustrated in Fig. 4, includes a plural ity of plates ll, 1.2, 13', 14', and 14 preferably made of different grades of steel, certain of'the plates as 13 being of multiple ply material and drill resisting, and certain of the plates-as 12' being torch resisting.

Circular bolt bars and 16 are arranged inconcentric relation on the face of the door, and the usual radial locking bolts 17 are slidably, located through said bars and arranged to be moved in unison by usual circular door bolt mechanism,not shown.

A bell crank 37 is pivoted as bycap screw 3Tfupon theinnersurface of the door, and one normally vertical arm 38 of the bell crank extends upwardly so that. its upper end 39 may normally freely rotate just below the lower surface of a laterally extending pin 33' mounted on a weight 29 and laterally extendmg. outward therefrom: through m vertically elongated aperture 34 in the rear door plates, the weight being suspended in the lower weight chamber 28 of: a verticalhy mending channel or guideway 27/ in the door, as by means of a chain including alternate links and 31, the links 31 being formed of a metal which fuses at a low temperature and which may be shattered by an explosion.

The other bell crank, arm 40 angular to the vertically extending arm 38 is provided with an elongated slot 41 in which slot ex;- tends a screw plug 42 mounted in the lower endof one of the radial bolts 17 'l As illustrated in Fig.4, thebolt work is in extended position and the auxiliary locking mechanism is inoperative, withdrawing of the bolts merely causing the upper end 39 of the bell crank arm 38 to pass beneath the lower surface of the pin I When an oxy-acetylcne or other torch or an explosive is used in an attempt to open the circular door 10 by an unauthorized person one or more of the. alternate links 31' will be melted'or shattered, allowing the weight 29 to dropto the end ofits chamber 28'. When the weight drops, the'pin 33' drops with it alongside of the outer edge face 43 of the bell crank. arm 38 below the upper end 39 thereof, thereby dogging oil and preventing movement of the bell crank arm and thereby preventing movementof the bolts.

The foregoing embodiments of the invention provide an auxiliary locking device, either for a rectangular or circular door, which includes a relatively few number of working parts, and easy and economical to loo manufacture, and adapted for simplicity and certainty of operation when an oxyacetylene or. other torch or an explosive is used in an unauthorized attemptto open the door, for positively locking, the bolt work against withdrawing and preventing opening of the door.

In order to prevent an unauthorized person from drilling a hole through from the front of a vault door providedwith the improved auxiliary lock for its bolt work, as herein set forth, .it is preferred to place one of the drill-proof plates 13 or 13 in front of the weight, as illustratedin Figs. 3 and 4.

If an unauthorized person could drilla hole through the door. from the front, it would be possible to inserta wire, chisel, or other tool, and either prevent the falling ofthe weight, or lift the same afterit has fallen.

By providing the. drill-proof. plateslin front of the weights, as aforesaid, such tampering withthe auxiliarylock is prevented.

In order likewise to prevent an'unauthoriZed, person from burning a hole through the front of a vault door with theimproved auxiliary lock for its bolt work, as lferein setforth, it is preferred to place a substanv tial thickness of torch resisting vplate as 12 in front of the weight, as illustrated in Fig. 4. a g

I claim:

1. An auxiliary lock for the bolt work and the like of vault doors and the like, including a fusible chain suspended upon the door, a weight suspended by the chain, a bolt work for the door, and a pin mountedupon the weight and normally extending laterally therefrom in ali-nement with parts ofthe bolt work for permittingnormal opera- 7 tion thereof, the pin being movable to dog off and prevent operation of the boltwork when the chain is fused or shattered.

2. An auxiliary lock for the bolt work and the like of vault-doors and the like, including a fusible chain suspended upon the door, a

weightsuspended by the chain, a bolt work for the door having a notch in one of its parts, and a pin mounted upon'thc weight and normally extending laterally therefrom in alinement with the bolt Work notch for. permltting'normal operation of the bolt work,

the pin being movable out of'alinement with the bolt work notch to dog oil and prevent operation of the bolt work when the chain is fused or shattered.

3. An auxiliary lock for the bolt work and the like of Vault doors and thelike, including a guideway in the door, a fusible chain suspended upon the door, a weight suspended from the chain in theguideway, a bolt Work for the .door, and a pin nounted'upon the weight and normally extending laterally therefrom in alinement with parts of the bolt Work for permitting normal operation of the bolt work, the pin being movable to dog off and prevent operation of the bolt work vwhen the chain is fusedor shattered.

4. An auxiliary lock for the bolt work and thelikeof vault doors and the, like, including a guidewayinthedoor, a fusible chain a suspended upon the door, a Weight suspended from the chain in the guideway, a bolt work for the door having a notch in oneof its parts, and a pin mounted upon theweight and normally extending laterally therefrom in alinement with the bolt work notch for j permitting normal operation thereof, the pin 7 being movable out of alinement'with thebolt worknotch todog off andprevent operation of the bolt Work when the chain is fused or shattered. v In testimony that I claim the above, I have hereunto subscribed my name. I

GEORGE H. BOCKIUS. 

